I have it on my '89 Diplomat with small block stroked 360. I had mechanic install and setup and I'm happy with it. I have better starts now than with carb, which was my main reason for purchasing. I was tired of dealing with difficult idle with cold starts and even some trouble with hot starts. I think throttle response is better too but can't be certain. I may have already squeezed every bit out of the engine. I did have to return the first Fuel Command Center to Summit due to failure of the pump, but had no problems and received a new one quickly and cost free.